In CentOS you can check to see if your dhcpd.conf file has any syntax errors before you restart DHCP and it fails to come up. You’ll need to run a command called dhcpd and point it to your configuration file like this: [root@dhcp-server ~]# dhcpd -t -cf /etc/dhcp/dhcpd.conf If

Sometimes in home lab environments you don’t have access to resources like vCenter to look at the guest VM status via console. Fortunately, you can modify ESX to enable VNC to a guest VM and use any computer to get KVM access. Pre-requisites: Network connectivity from your client to the

I’ve came across a yet another easy and cool home project that is intended for Rapsberry Pis, but can run on any flavor of Linux (Requirements here). Its called Pi-Hole and you can set it up in 5 minutes or less. Website: https://pi-hole.net/ The idea is simple: it blocks all

In my previous posts regarding setting up ZFS on Ubuntu 16.04, I had referred to Aaron Toponce’s website on doing additional configuration to ZFS such as sharing via NFS or SMB. In the portion for SMB here: https://pthree.org/2012/12/31/zfs-administration-part-xv-iscsi-nfs-and-samba/, it seems that there is a couple more things to do. After running zfs set

On my previous post, ZFS on Ubuntu Linux, I had setup ZFS on Ubuntu 14.04 by adding a ZFS repository, installing multiple packages and such. Now on 16.04 and 16.10, it is available by simply typing: sudo apt-get install zfs My previous post covers how to setup a ZFS Pool,

For quite some time i’ve been told that peoples bluetooth Mac keyboard and mouse gets disconnected intermittently. I’ve done the usual, make sure the battery is good, reset the PRAM, Reset the Bluetooth adapter via the hidden menu, but no luck. We kind of brushed it off as there is

If you have SSH access to your ESX server, smbiosDump has some very useful information. If you look in “OEM Strings: #14”, you can see some very useful information: [root@ucs-test1:~] smbiosDump | grep “OEM Strings: #14” -A 4 OEM Strings: #14 $SPI:rack-unit-13 <- Server ID $SPT:hx-nodes <- Service Profile Template

I have a wall-mounted TV in the office where I want to show dashboards of different metrics. Cluster status, Nagios, network bandwidth, uptime, etc. They are all web-based and can be opened via web browser. I used Google Chrome and hit F11 to enter full screen mode to display my

I had one system where the disk (sde)was formatted with a GPT partition, but fdisk did not show any partitions # fdisk -l /dev/sde WARNING: GPT (GUID Partition Table) detected on ‘/dev/sde’! The util fdisk doesn’t support GPT. Use GNU Parted. Disk /dev/sde: 1000.2 GB, 1000204886016 bytes 255 heads, 63

I had an issue where a system refused to do any apt-get updates. I think the user must of tried running apt-get update and canceled half-way through. My usual trick of running apt-get clean did not work so well: E: Some index files failed to download. They have been ignored,